This Service Repair Workshop Manual covers the Mercury Mariner M2 Jet Drive models manufactured between 1999 and 2004. These marine propulsion systems are engineered with a V6 engine configuration, delivering 240 HP and utilizing an electronic ignition system. Designed for reliable performance on the water, the M2 Jet Drive is characterized by its jet drive transmission and water-cooled system, suitable for freshwater or raw water applications. Its robust construction and efficient power output make it a dependable choice for various boating needs. This comprehensive manual provides essential information for the maintenance, repair, and technical understanding of your Mercury Mariner M2 Jet Drive. It details critical procedures, including scheduled maintenance, fluid specifications, and troubleshooting guidance. Owners, technicians, and mechanics will find detailed technical specifications and safety guidelines within these pages, ensuring the longevity and optimal performance of the vessel. The manual is presented in English and is designed to be a definitive resource for all service-related inquiries.